just a quick question. can i use this to prime the back of ply for a floor
cheers ian

Yes.............

Depends what adhesive you are going to use, some Mapei adhesives don't need sealing, some potted gear do.

You would be better using a synthetic primer ian.....


SBR Bonding/Admix agent - (Everbuild)


(Do not be tempted to use cheaper PVA which moisture breaks down)

SBR Bond is a latex based - Highly suited for priming areas before tiling

Water resistant bonding/priming agent and admixture for use in areas subject to humidity, dampness and continuous water contact

Improves water resistance of cement mixtures by forming a reinforcing polymer that increases long term durability and flexibility of the mix on renderings and floor screeds adhesive etc.

Can be diluted up to 3:1 with water - follow instuction on bottle


Size: 5 litre


Price: £11.99 £13.79 Including VAT at 15%

MAPEI

Hi
primer g is not designed for priming plywood. It is primarily for priming gypsum based substrates and anhidryte screeds prior to tiling.

See below...
Synthetic-resin-based water dispersion primer.
Applications:
Treating gypsum or anhydrite surfaces prior to applying cement-based products (Kerabond, Ultraplan, Nivoplan, etc.). Treating cement-based surfaces (cast concrete and prefabricated walls etc.) prior to laying gypsum-based plasters. The substrate must be clean and absorbent.
Dilute Primer G with water from 1:1 to 1:3 to protect old porous floors before levelling, to prevent residual dusting and to provide even absorption of substrates prior to levelling or laying. Apply on perfect dry gypsum or anhydrite surfaces (residual moisture content less than 0.5%). Coverage
100-200 g/m2 depending on use. Packaging
25 - 10 - 5 kg drums and 12x1 kg packs.

Done loads of floor jobs and always use it on ply..always use Mapei adhesive mind you.

i hear what Fred and Nick are saying and will bear this in mind.

Originally Posted by brian c

Done loads of floor jobs and always use it on ply..always use Mapei adhesive mind you.

i hear what Fred and Nick are saying and will bear this in mind.

cheers brian
out of interest do you prime the face aswell

i usually only prime the face m8.

i do use mapei products but always use the primer g as added insurance.I am sure im not the only one.

now I think, if you were going to use any Mapei Primer on wood it would be Eco Prim T. I use this on plywood prior to self levelling over UFH. It is designed to help the SLC and also adhesives adhere to the plywood. Also suitable for other substrates.
See PDF DATA SHEET...........
http://www.mapei.it/Referenze/Multim...rim%20t_gb.pdf

Originally Posted by Dave

You would be better using a synthetic primer ian.....


SBR Bonding/Admix agent - (Everbuild)


(Do not be tempted to use cheaper PVA which moisture breaks down)

SBR Bond is a latex based - Highly suited for priming areas before tiling

Water resistant bonding/priming agent and admixture for use in areas subject to humidity, dampness and continuous water contact

Improves water resistance of cement mixtures by forming a reinforcing polymer that increases long term durability and flexibility of the mix on renderings and floor screeds adhesive etc.

Can be diluted up to 3:1 with water - follow instuction on bottle


Size: 5 litre


Price: £11.99 £13.79 Including VAT at 15%

Now that's a nice price!

Originally Posted by connors12345

just a quick question. can i use this to prime the back of ply for a floor
cheers ian

You seal the back and sides so need something to keep the moisture out!