Basecoats & Adhesives
WBS Fibre Base
A versatile basecoat offering high levels of flexibility, improved tensile strength & anti-crack resistance.
WBS UF Base
A basecoat with excellent workability qualities. Can be sprayed or applied using traditional methods. Ideal as a basecoat for thin coat acrylic finishes.
WBS Bedding & Scrim Adhesive (HP12)
HP12 uses high polymer technology, creating a cost effective basecoat with enhanced adhesion for difficult substrates.
HP12 is also widely used for its flexibility and tensile strength for thin coat systems. Incorporation of an alkali resistant fibre mesh may be required.
WBS Bedding & Scrim Adhesive (HPX)
HPX is an ultra high-performance render incorporating high polymer technology and fibres, it is generally used on unusual substrates that require greater flexibility and adhesion.
In addition HPX has proven to work exceptionally well with a wide range of building boards. Incorporation of an alkali resistant fibre mesh is usually required.
WBS Bedding & Scrim Adhesive (K&A)
K&A adhesive is a mineral based, bonding and reinforcing filler with water repellent & vapour permeable properties.
It is ideal for use on the HECK external wall insulation systems, using any type of insulation board. K&A’s flexibility and tensile strength is ideal for use with thin coat silicone & acrylic systems. Incorporation of an alkali resistant fibre mesh is always required.
WBS Bedding & Scrim Adhesive (ZF)
A ready mixed, high-performance adhesive incorporating high polymer technology and fibres. Being a cement free paste, ZF is easy to apply, highly flexible, extremely fine grained and offers outstanding adhesion.
Suitable for use on the HECK external wall insulation system (using EPS insulation boards only) and is an ideal product for use with thin coat silicone & acrylic systems. Incorporation of an alkali resistant fibre mesh is always required.
WBS Brick Slip Adhesive (BA1)
BA1 is a polymer modified, high performance adhesive, ideal for brick slip application, due to its tensile strength, ease of application and flexibility.
Choosing the right basecoat for your chosen WBS External Wall Insulation System
When considering the right adhesives to use on a particular project, a number of variables should be considered, including the substrate, the insulant type and the finial finish required.
The table below gives a good indication as to which products should be used in various circumstances.
NOTE: Please consult WBS Technical Department for other substrates such as non-traditional housing, timber frame, steel frame, ICF, SIP’s etc.
Traditional EWI System with Cementitious Finish
| Substrate | Insulant | Basecoat | Fixing Method | Reinforcement | Finish | BBA/ETA |
|---|---|---|---|---|---|---|
| Masonry Concrete | EPS MW PIR PUR PH | HP12 minimum 3mm | Wet / Dry + Mechanical | WBS Alkali resistant glass fibre reinforcing mesh | 6-8mm dashing mortar with dry dash finish or *other finish | BBA Certificate No 03/4058 + Detail Sheet 3 |
Heavyweight EWI System with Lathe Reinforcement & Cementitious Finish
| Substrate | Insulant | Basecoat | Fixing Method | Reinforcement | Finish | BBA/ETA |
|---|---|---|---|---|---|---|
| Masonry Concrete | EPS MW | HP12 or UF minimum 10mm | Wet / Dry + Mechanical | Metal Lathe | 6-8mm dashing mortar with dry dash finish or *other finish | BBA Certificate No 03/4058 + Detail Sheet 2 |
EWI System with Anti-Crack Silicone / Acrylic Finish ‘Thin Coat’
| Substrate | Insulant | Basecoat | Fixing Method | Reinforcement | Finish | BBA/ETA |
|---|---|---|---|---|---|---|
| Masonry Concrete | EPS LAM MW | K&A minimum 3mm | Wet / Dry + Mechanical | WBS Alkali resistant glass fibre reinforcing mesh | Silicone/Acrylic ‘K’ Finish 1.0/1.5/2.0/3.0mm Silicone/Acrylic ‘R’ Finish 1.5/2.0mm | ETA 05/0045 EPSETA 05/0079 LamellaETA 05/0216 MW |
EWI System with Pure Acrylic Basecoat Anti-Crack Silicone / Acrylic Finish ‘Thin Coat’
| Substrate | Insulant | Basecoat | Fixing Method | Reinforcement | Finish | BBA/ETA |
|---|---|---|---|---|---|---|
| Masonry Concrete | EPS MW | ZF minimum 3mm | Wet + Mechanical | WBS Alkali resistant glass fibre reinforcing mesh | Acrylic ‘K’ Finish 1.0/1.5/2.0 /3.0mm Acrylic ‘R’ Finish 1.5/2.0mm | ETA06/0273 EPS |
EWI System with Wetherby Brick Slip Finish
| Substrate | Insulant | Basecoat | Fixing Method | Reinforcement | Finish | BBA/ETA |
|---|---|---|---|---|---|---|
| Masonry Concrete | EPS MW PIR PUR PH | BA1 | Dry + Mechanical | WBS Galv /Stainless Brick Slip Mesh | Brick Slip |
Uninsulated Brick Slip Application
| Substrate | Insulant | Basecoat | Fixing Method | Reinforcement | Finish | BBA/ETA |
|---|---|---|---|---|---|---|
| Masonry Concrete CSB | None | BA1 | Mechanical | WBS Galv /Stainless Brick Slip Mesh | Brick Slip |
Render Only onto approved Building Board
| Substrate | Insulant | Basecoat | Fixing Method | Reinforcement | Finish | BBA/ETA |
|---|---|---|---|---|---|---|
| CSB | None | HPX / ZF 3-4mm | N/A | WBS Alkali resistant glass fibre reinforcing mesh | 6-8mm Basecoat render with dry dash finish or *other finish |
Abbreviations
- (PH) – Phenolic
- (PIR) – Polyisocyanurate
- (MW) – Mineral Wool
- (EPS) – Expanded Polystyrene
- (PUR) – Polyurethane
- (CPB) – Calcium Silicate Board
