Seal UPVC Products Ltd

Providing Double Glazing since 1988

Unit 3-4, Cross Hands Business Park, Cross Hands, Llanelli, SA14 6RB Directions

   Now closed Open Friday 09:00 - 14:00

Why Choose Us?

Free Parking
Friendly Service
First Class Service

Business overview

Call us for all you window and door needs

At Seal Upvc we understand our customer needs, having been established for over 31yrs. We offer a professional and reliable service for all your double glazing needs. We offer kitemark products to ensure security and weather tested products. Secure by design.


security door

Products & Services

Free Initial Consultation

BSI ISO 9001

NQA 9001

FENSA member

Payment by cash and cheque

Window repairs, installation and supply

Patio, porch, UPVC, folding and external doors

Leaded lights and windows, security glass

Conservatories and porches

Victorian windows, sash windows

Replacement doors, door repairs

Bifold Doors

Door Fitting

Double Glazing Repair

Double Glazed Porches

External Doors

Glass Suppliers

Patio Doors

Replacement Windows

Sliding Doors

Sash Windows

UPVC Windows

Window Installation

Aluminium Doors


Door Repairs

Double Glazed Windows

Folding Doors

Porch Doors

Aluminium Windows

Casement Windows

Conservatory Repairs


Double Glazing Materials

Front Door Installation

Locks Repaired

Replacement Doors

Sash Window Repairs

Security Lock Installation

Window Repairs

Toughened Glass

Window Companies

UPVC Doors



poor customer service

called to get a quote and never responded, called again and the lady was extremely rude so not going to bother again, customer service was very poor
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Far from impressed

Arrived late, no apology.
Apparently Seal are specialists in low-hanging fruit, unwilling to consider anything slightly out of the ordinary, inconvenient or difficult.
Scared of scaffolding.
Very disappointing.
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Excellent service and would highly recommend them. Respond quickly to quotation requests and subsequent queries, and always very helpful. Reasonably priced and deliveries prompt.
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Brilliant service

Seal fitted a new conservatory for me in April. Brilliant service, workmen polite competent and punctual, great job. The ‘Pearl’ roof has done a sterling job in this hot weather keeping the conservatory cool. We practically live out there now. Would highly recommend
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Patio doors

A bit poor when cannot close either door and told no fitters available until's Friday...not very happy security a woman on own all weekend and cannot contact by phone on weekend...don't relish staying in to guard house either...
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