PESF TOP Chemical Anchor

Injectable polyester chemical anchor with European ETA7 approval — for concrete and hollow blocks, in a cartridge that fits a standard silicone (caulking) gun.

ETA7 — Concrete & BlocksSeparate ETA for masonryWet holeFire ratingGreen certified — LEEDStandard silicone gun

The Adit chemical anchor family

Choose the right adhesive for your load, substrate and approval requirements.

AC500Epoxy · ETA1 · Cracked concrete · Underwater Chemfix100Epoxy · ETA1 · Shock · Green certification Chemfix200Hybrid · ETA + ESR · Potable water CT50ProPolyester · ETA7 · Concrete & blocks PESF TOPPolyester · ETA7 · Caulking gun Hollow BlocksSleeves & mesh for anchoring in block

Technical specification

Property	PESF TOP — polyester chemical anchor, European approval
Adhesive type	Polyester
Technology	Injectable chemical anchoring
European approval	Yes — ETA7 for concrete (15-0008) · ETA for masonry (19-0496)
Separate ETA approvals	2 — concrete and hollow block
Tested rebar	Up to Ø25 mm rebar
Wet hole	Yes
Fire rating	Yes
Green certification	Yes — LEED
Gun	Standard silicone (caulking) gun — no dedicated injection gun required
Applications	Anchoring in concrete and hollow block

Downloads

Installation & field pull-out test videos

Polyester chemical anchor: the complete guide

Everything you need to know about the polyester chemical anchor — from the working principle, through installation in concrete and hollow blocks, to the projects it serves. This guide was written by the experts at Adit Ltd., the largest chemical-anchor company in Israel.

What is a polyester chemical anchor and how does it work?

A polyester-based chemical anchor is a two-component system made of a polyester resin and an accelerator (hardener). When the two components are mixed inside the static mixing nozzle, a chemical reaction immediately begins, producing a rigid polymer that bonds powerfully to the base material — concrete, blocks, stone and rock.

During installation the anchor is injected into the drilled hole, and then the threaded rod (ATR) or reinforcing bar is inserted. After curing, a solid, reliable connection is formed that withstands heavy loads and applies no expansion pressure to the walls of the hole.

The best-selling chemical anchor in Israel

PESF TOP is a premium polyester chemical anchor with European ETA7 approval — for both concrete and hollow blocks. In terms of formulation and approvals it is the exact same adhesive as CT50Pro, but packaged in a compact 300 ml tube that fits a standard silicone (caulking) gun. Its field advantage is clear:

European ETA approval — meets the stringent European standard for concrete and for masonry.
Competitive price — the most cost-effective solution in the premium chemical anchoring category.
Maximum versatility — suitable for concrete, stone and solid blocks, and ideal as a chemical anchor for hollow blocks.
Fast curing — loads can be applied within about 8–12 hours at 20°C, and even faster in the Israeli summer.
Standard silicone gun — no need to carry a dedicated, heavy injection gun.
Proven experience — used in thousands of public and private projects in Israel and worldwide.

Chemical anchor for hollow blocks — the solution that works

One of the most notable advantages of PESF TOP as a chemical anchor is its proven ability to work efficiently and safely in walls made of hollow blocks (such as Ytong, pumice or “black” block).

Unlike mechanical anchors that cannot fix themselves inside the block’s internal cavity and tend to break its delicate webs, the chemical anchor flows into the cavity — with the help of a dedicated plastic mesh sleeve — expands beyond the mesh and grips the block walls from every direction. The result is a strong, wide and durable “chemical plug” that cannot be pulled out.

PESF TOP — the same technology, in a silicone-gun tube

PESF TOP is essentially the same premium polyester adhesive as CT50Pro, in a compact 300 ml tube. The small format is especially suited to:

Spot jobs and hard-to-reach locations.
Contractors, awning installers and plumbers performing individual anchorings.
Saving material and preventing waste on small projects.
Convenient field work with a standard silicone gun — no dedicated injection gun required.

PESF TOP retains all the performance characteristics, ETA approvals and recognized quality of CT50Pro — just in a more accessible, cost-effective format for the end user.

Comparison: PESF TOP vs. other anchor types

Product	Chemical type	Notable approvals	Suitable for
PESF TOP / CT50Pro	Pure polyester adhesive	Full ETA approval, dedicated approval for blocks	Standard applications, chemical anchor for hollow blocks, concrete, bricks
Chemfix200	Advanced hybrid vinylester	ETA for all, including seismic C1/C2	Dowels, structural anchoring, seismic requirements, fast work
Chemfix100	Advanced epoxy	ETA for all, including seismic C1/C2	Dowels under extreme loads, deep structural anchoring, seismic environments
AC500 V4	Advanced epoxy	ETA for all, including seismic C1/C2	Massive dowel anchoring, infrastructure, stringent seismic requirements

Thousands of projects in Israel — PESF TOP in the field

The PESF / CT50Pro polyester chemical anchor has proven itself over many years in some of the largest and most complex projects in Israel:

Highway 20 (Ayalon Highways): anchoring of signage, electrical and structural infrastructure along the main interchange axis in Tel Aviv.
Dozens of infrastructure tunnels: withstanding harsh humidity conditions and heavy-duty work across the country.
Hundreds of towers and high-rise buildings: reinforcement projects, balcony extensions, anchoring of structural elements and dowel anchoring to floors.
National infrastructure projects: new road paving, bridges, public parking garages, factories and large logistics warehouses.
Anchoring in blocks: the everyday solution for anchoring in hollow blocks across tens of thousands of housing units nationwide.

Why choose Adit Ltd. for your chemical anchor?

Adit Ltd. is the largest, most experienced and leading company in the field of anchors and chemical anchor systems in Israel. Choosing Adit gives you much more than a quality raw material:

In-depth engineering consultation: a certified engineering team advises on selecting the right chemical anchor and performs complex load calculations.
Field training: company representatives come directly to construction sites to train installation crews on compliant, safe application.
International standards: all products undergo rigorous quality control and hold official approvals (CE and ETA).
Wide, available inventory: fast, direct supply to any location and project in Israel.
Continuous technical service: full support before, during and after project completion.

Frequently asked questions

What is the difference between PESF TOP and CT50Pro?

Both products contain exactly the same premium polyester adhesive formula. The only difference is volume and packaging: CT50Pro comes in a large 410 ml cartridge for heavy-duty projects and requires a professional injection gun, while PESF TOP comes in a 300 ml tube that fits any standard silicone gun — a winning solution for spot jobs.

Is a chemical anchor really effective in hollow blocks (Ytong / pumice)?

Yes. A chemical anchor for hollow blocks is the safe engineering solution and the only one that truly works over time. Because the block is hollow, conventional metal anchors rest “on air” and tend to crush the block’s delicate webs. The chemical anchor fills the cavity using a dedicated mesh sleeve, hardens into a wide “plug” behind the web, and grips the block without applying destructive pressure.

How do you install a chemical anchor in a hollow block?

Drill without hammering (no rotary hammer) so as not to crush the internal webs. After cleaning out the dust, insert a plastic mesh sleeve (screen basket) into the hole. Inject the chemical anchor into the sleeve until it is full, then insert the bolt with a rotating motion. The mesh causes the material to seep sideways, swell in the cavities and lock the anchor completely in place.

What is the difference between a chemical anchor and a steel wedge (Jumbo) anchor?

A wedge anchor is metal and relies on expansion: the more you tighten it, the more it presses against the concrete walls, so it must not be installed too close to edges and is not suitable for blocks. A chemical anchor works by polymer bonding — it applies no expansion pressure, so it allows work close to edges and is safe for blocks and stone.

How long does the chemical anchor take to cure?

A polyester-adhesive system has a very fast gel and curing time. At about 20°C the material begins to harden within a few minutes, and load can be applied after about one hour. On hot summer days curing is greatly accelerated; in winter wait a little longer. Always refer to the curing table printed on the tube.

Can polyester adhesive be used in a wet hole?

Yes — PESF TOP is approved for work in a wet hole. Polyester excels in dry concrete and standard substrates; for fully water-saturated or underwater work use a more advanced adhesive such as hybrid vinylester (Chemfix200) or pure epoxy (Chemfix100).

When is it better to choose polyester over pure epoxy?

A polyester-based chemical anchor is the most economical solution for standard work and provides especially short curing times — the leading choice for air-conditioner installers, pergolas, window bars and anchoring in hollow blocks. Turn to pure epoxy when critical dowel anchoring, industrial edge loads, cracked concrete, underwater work or stringent seismic requirements are involved.

How should you store a chemical anchor after partial use?

The material inside the cartridge does not dry out as long as it has not been mixed in the nozzle. If material remains after a job, leave the used nozzle attached — it acts as a natural cap. Before the next use, unscrew the dried nozzle, fit a new clean mixing nozzle, and the material flows like new. Store in a cool, shaded place (5°C–25°C).

What does the ETA approval on the chemical anchor mean?

The ETA (European Technical Assessment) is the official, most stringent European standard for chemical and mechanical anchors. Its presence confirms the product has been tested in independent laboratories and met all guaranteed load specifications, allowing engineers to design with it in official and public projects with full confidence.

Is it suitable for hollow blocks with a dedicated approval?

Yes — there is a separate ETA approval for blocks (19-0496), in addition to the ETA7 approval for concrete. In a hollow block you must use a sleeve or mesh, which prevents the adhesive from leaking into the internal cavity.

Not sure whether you need polyester or epoxy? Tell us about the base material and the load — our engineers will recommend the right adhesive at the right price.

Talk to our engineers