Sika Building Trust

Sikalastic -625N Fully-Reinforced System

Manufacturer: Sika Building Trust 

Materials: Polyurethane 

The Sikalastic -625N Fully-Reinforced System consists of:
• Sikalastic -625N — a one-part, moisture-triggered, aliphatic based polyurethane
• Sika Concrete Primer — a primer for concrete substrates
• Sika Concrete Primer LO — a low odour primer for concrete substrates
• Sika Metal Primer — a two-part primer for the treatment of previously untreated metal surfaces and for spot
priming of areas of corroded metal after preparation
• Sika Bonding Primer — a primer for concrete substrates
• Sika Reemat Premium — a non-woven glass reinforcement
• Sika Flexitape Heavy — a nylon mesh for use at metal substrate joints
• Sikafloor -701 — a two-component epoxy primer, levelling mortar and mortar screed binder.


BBA logo

Number: 16/5294 PS3
Issue date: 15/07/2022

ETA logo

Number: 20/1023
Issue date: 20/12/2020

Approved for use on


Flat Roofs 

The Sikalastic -625N Fully-Reinforced System is satisfactory for use as a system on flat roofs with limited access.

Substrate


Concrete Insulation Boards Mastic Asphalt Plastic PUR or PIR Insulation Reinforced Bituminous Membranes Steel 

The Sikalastic -625N Fully-Reinforced System is satisfactory for use as a system on flat roofs with limited access on:
• concrete (primed and unprimed)
• asphalt
• bituminous roofing membranes, including mineral surfaced
• galvanized steel
• non-mineralised bitumen roofing membranes on plywood
• liquid-applied bituminous roof coating
• aluminium paint
• polyisocyanurate (PIR) foam insulation boards in conjunction with a specified carrier membrane
• existing polyurethane roofs

Durability


25 Years 

Under normal service conditions, the system will achieve a service life of at least 25 years.

Installation Requirements


Installation of the system must be carried out only by specialist roofing contractors trained and approved by the Certificate holder.

Puncture Resistance


P3 - accessible for maintenance of plant and equipment and to pedestrian traffic

Least compressible (eg concrete)


Fire Safety


When tested to DD CEN/TS 1187 : 2012, Test 4, and classified in accordance with BS EN 13501-5 :2016, the following specifications achieved a BROOF(t4) classification and so are unrestricted with respect to proximity to a boundary by the documents supporting the national Building Regulations:
• a 12 mm thick primed plywood substrate, 0.6 mm thick self-adhesive vapour control layer, a 80 mm thick glass faced, polyisocyanurate insulation board adhered with a polyurethane adhesive and primed, a 0.6 mm thick self adhesive carrier membrane, a base coat of Sikalastic -625N at an application rate of 1.0 l·m–2, a layer of Sika Reemat Premium, and a top coat of Sikalastic -625N at an application rate of 1.0 l·m–2(1)
• a system comprising a 6 mm calcium silicate board, a 2.6 mm thick SBS modified bitumen roofing membrane, a base coat of Sikalastic -625N at an application rate of 1.0 l·m–2, a layer of Sika Reemat Premium and a top coat of Sikalastic -625N at an application rate of 1.0 l·m–2(2)
• a system comprising a 6 mm calcium silicate board, a base coat of Sikalastic -625N at an application rate of 1.0 l·m–2, a layer of Sika Reemat Premium and a top coat of Sikalastic -625N at an application rate of 1.0 l·m–2(3).
(1) Fire test and classification reports, reference 19823B and 19823C respectively, conducted by Warringtonfire. Report available from the Certificate holder.
(2) Fire test and classification reports, reference 19823F and 19823G respectively, conducted by Warringtonfire. Report available from the Certificate holder.
(3) Fire test and classification reports, reference 19823K and 19823L respectively, conducted by Warringtonfire. Report available from the Certificate holder.

The classification and permissible areas of use of other specifications should be confirmed by reference to the
requirements of the documents supporting the national Building Regulations.


Certified Products

The following products are also covered by the same certification:

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Sika Building Trust

Sika House
Miller Street
Preston
Lancashire
PR1 1EA

T : 01772 259781

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